I know of a place in Lynnville, IN near Evansville, IN. It has thousands of acres of coal mining property. It is legal to ride and free.
Easy to find off I 64. Take Lynnville exit and park in the Kiwanis Club parking lot easily seen from the exit on the south side of the interstate.
Comments:DONT RIDE AT THE LIONS CLUB,DNR WILL TAKE UR BIKE OR ATV OFFLIMITS